NI PCI-6221 High-Performance Multifunctional Data Acquisition Card

16-bit ADC Resolution: With a dynamic range of 98dB, it captures microvolt-level signals (e.g., weak sensor outputs, bioelectrical signals), suitable for high-precision measurement scenarios.

Multi-Channel Synchronous Sampling: 16 analog input channels support synchronous sampling at up to 250kS/s, meeting requirements for parallel monitoring of multiple signals (e.g., synchronous multi-point acquisition of mechanical vibrations).

Analog I/O: 16 analog inputs (selectable ranges: ±10V, ±5V, ±1V, ±0.5V), 2 analog outputs (±10V, 16-bit resolution), supporting voltage signal acquisition and excitation output.

Digital I/O and Counters: 24 digital I/O (TTL/CMOS compatible), 3 32-bit counters/timers for pulse counting, PWM signal generation, and digital logic control.

Triggering and Synchronization: Supports analog triggering (edge/window), digital triggering (TTL level), external clock synchronization, and re-triggering, adapting to multi-device collaboration (e.g., synchronous acquisition with DAQ modules or instruments).

PCI Bus Interface: 32-bit/33MHz PCI bus with DMA technology enables real-time transmission rates up to 132MB/s, suitable for continuous large-data-stream acquisition.

Software Ecosystem: Compatible with development environments like LabVIEW, MATLAB, Python, and C++; programmable via NI-DAQmx driver, supporting Windows (7/10) and Linux systems.

Process Control: Acquires signals from temperature, pressure, and flow sensors, combining with analog outputs to implement PID closed-loop control (e.g., temperature regulation of chemical reaction kettles).

Equipment Health Monitoring: Synchronously acquires vibration and current signals to analyze the operation status of motors, fans, etc., for fault early warning and maintenance.

Physics and Biomedical Experiments: Acquires signals such as acoustic waves, electroencephalogram (EEG), and electromyogram (EMG) for waveform analysis and spectral characteristic research.

Sensor Calibration: Provides excitation signals for pressure and strain sensors, synchronously acquires output data to complete linearity and sensitivity calibration.

Signal Integrity Analysis: Acquires timing signals of digital circuits to evaluate clock jitter and edge characteristics for PCB design verification.

Communication Protocol Simulation: Simulates protocols like UART, SPI, and I2C via digital I/O to test chip interface compatibility and timing correctness.

Analog Signal Chain: Input signals undergo anti-aliasing filtering, are converted to digital signals by a 16-bit ADC, and undergo real-time filtering, scaling, and buffering via FPGA.

Digital Signal Processing: Digital I/O and counter modules achieve hardware triggering and event response through on-board logic circuits, supporting high-speed timing control.

Data Transmission: Transmits data to the host via PCI bus or DMA technology, supporting real-time storage of large data streams in continuous acquisition mode.

Hardware: Compatible with desktop or industrial computers with standard PCI slots, combinable with other NI PCI modules (e.g., PCI-6733 analog output card) to build complex test systems.

Software: Enables cross-platform programming via NI-DAQmx driver, supporting LabVIEW graphical development and Python/C++ text interfaces for easy integration into custom test platforms.